I have a Braun/Oral B electric toothbrush that is slowly fading out. At first, the green l.e.d. charging light would barely light even though it would still charge. Then, a few days later, the two minute timer that interrupts the motor stopped working. Finally, the motor speed has dropped noticeably and will not even run for two minutes. I'm trying to figure out how to disassemble this thing and maybe replace the batteries. It's approximately ten years old. Here is a picture of the bottom casing.
I've poked and prodded but can't seem to get this thing apart without chipping the plastic. If anyone has been down this road before I'd like to know how to change the batteries.
Thanks for your reply.